parsons



F. A. PARSONS.

MILLING MACHINE.

APPLICATION FILED SEPT 5,1916.

2 SHEETS-SHEET 1.

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F.A.PARSONS.

I MILLING MAGHlNE. APPLICATION FILED SEPT. 5. 6916.

2 SHEETS-SHEET 2.

p Rove/n11)? 3751116 dbtorrcegJ'.

Patented June 24, 1919.

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A GONS'IN.

new; a a sist improvem nts 1 ning- Th -tenths .f it' fli s to ievisi n for vertical adjust en rennet between thewe isandtaaeni nag mattress o s"whenspinare ty er 1 1 ft pnp id shi knee and. horizontally sliding saddle and table, the spindle is usually made vertically djustabl Ibi neces ita es mount ng the spindle in ari aiiiii iary he ad tfi 'tatri jei j which in turn is slidably mounted in the supporting column or frame at the expense of that rigidity and stability essential to prevent deflection of the spindle and cutter by cutting or working strains.

Such an arrangement also necessitates the provision for raising and lowering the auxiliary spindle head or carrier, means such as adjustable gibs for taking up wear and play in the sliding bearings between the spindle head and column, and means such as clamps, for locking and holding the spindle head and spindle as rigidly as possible in adjusted position thereby materially and detrimentally complicating the construction of machines of this type.

In the smaller machines of this type, the supplementary vertical movement of the spindle is sometimes omitted, since, although it is very inconvenient, it is not beyond the strength of the operator to raise the work table together with the saddleand knee.

The main objects of the present invention are to facilitate the vertical adjustment of the relation between the work mounted on the table and the cutter mounted on the spindle without resorting to vertical movement of the spindle and its bearings or support; to avoid the above noted complications in the construction of such machines incident L M 1:: ispeci t j nlo etters int nt mattresses s ltembr aierc. i l ,m l. j i

consmaassrencni 120 THE KEEMrsM TH l ,un. i l Milli;

to niakiiiglthe spindle vertically or and general] cdn trucaon Eli and operation o machines of Ml it i. 1; ef nyention stasis-he the ran ement; establishes and peculiar areoinb'ination of after pa n'eeiarly described at, having an overhanging arm b j in whith a vertical nutter r W spindle c is i'o teb y tween said ways with avertical slot 6. This slot is closed on the inner side by a housing or inwardly offset wall f, open at the top and closed atthe bottom, as shown 1n Fig. 1. l

The machine is provided with a work supporting organization like or similar to that prising a vertically movable knee 9, slidably mounted on the ways d of the column a saddle 72, slidably mountedon and movable employed in machines of this class, and comhorizontally lengthwise of the knee 9, and

a table 21, slidably mounted on the saddle and movable horizontally crosswise of the saddle.

Means for raising and lowering the work su iporting organization by hand or power, such as a vertical screw shaft j, connecting the knee 9 with the base of the column, are provided.

The knee is provided with a stud or part is, projecting through the slot 6 in the col' umn into the housing f, for the attachment of a counterbalance such as a weight, as hereinafter described to facilitate the vertical adjustment or movement of the Work With relation. to thecutter, and to avoid occasion for the vertical adjustment or movement of Weight Z, inclosed and guided in the columna, is connected by a chainim oriother suit- I able flexible connection passing over grooved v guiding sheaves n. in the. upper. part-0t the column and attached to. the-stud 70 Within. the housing f, Whichistraversed. by' thestud in the vertical movement of the knee. The counterweight. is preferably guided and held inplace Within the column byrvertical ribs orguides 0 formed on or attached to opposite Walls of the column and loosely engaging correspondinggrooves orz wa ys pin the counterweight. The counterwcightmay be made in various Ways, of different sizes, shapes. and materials;- according to, the size aiird adesign of the. machine tofWhich it is ap, p 1e Various modifications, in the construction and arrangementof parts of the. machine other than thosementioned, may be made, Without departure from the principle and scopeiof the inventionaas defined in the following claims.

Copies of this patent, may be obtained for I claim:

1. In a millingmachine the combination of'a'hollow column having a vertical slot closed at the back and sides by an inwardly offset Wall, a sheave mounted in the column above the slot, a-vertioally adjustablework supportgui'ded onthe columnand having a part projecting into said slot, a counterbalance Within the column, and a flexible connection passing over the sheave and attached to the counterbalance and to the inwardly projecting. part of the Work support, Within said slot.

2. In a niillingmacliine the combination of a-hollo-w column having an overhanging arm provided Witlt a stationary bearing, a verticalislotini one sideand. inset housing for the slotopen; at the top and closed at the sidesa-nd ,back, a vertical spindle rotatably mounted. insaid bearing, avertically movable. work support slidably mounted on the slottediside of; the column. below its overhanging; arm and having a part projecting through said slot, a vertically movable Weightv'inclosedl and guided in said column and adapted'lto approximately balance said worksupport, sheaves, mounted in the col- 1111.111abOYQtllQWGlgllll, and a flexibleconnection passing overthe sheaves and attachcd to the Weight and .to the projection on-tl e Work. support within said housing.

FRED A. PARsoNs.

fiveoents each, by addressing the Commissioner of Patents, Washington, D. C. 

